Diaphragm and intercostal surface EMG and muscle performance after acute inspiratory muscle loading

Test/Retest Reliability of Maximum Mouth Pressure Measurements With the MicroRPM in Healthy Volunteers

“…This conclusion is confirmed by both the predicted ICC values obtained with the Spearman-Brown formula and the real ICC values calculated from the first 2 repetitions (see Table 3). These results also agree with previous research 24,29 and this finding emphasizes that, even without prior submaximal respiratory activity (as has been suggested), a well organized protocol including a familiarization procedure (ie, with 5 maximum efforts) can provide reliable MIP and MEP measurements with very few repetitions.…”

Inspiratory muscle warm-up does not improve cycling time-trial performance

“…The 8% increase in MIP after the IMW is consistent with previous studies (Hawkes et al 2007;Lin et al 2007;Lomax et al 2011;Ross et al 2007;Tong and Fu. 2006;Volianitis et al 1999;Volianitis et al 2001) and similar increases have also been observed in the maximal rate of inspiratory pressure development (Lin et al 2007;Tong and Fu.…”

“…These changes have been attributed to improved coordination / synergy of the inspiratory muscles and / or increased voluntary activation of the inspiratory muscles (Hawkes et al 2007;Ross et al 2007). It is suggested that IMW-mediated increases in MIP reduce the fractional utilisation of maximum tension generated with each inspiration, thereby reducing dyspnoea and increasing exercise tolerance (Lin et al 2007;Tong and Fu.…”

“…2003b;Jones et al 2003), typical warm-up protocols elicit only a low-to-moderate ventilatory demand and it has thus been suggested that the respiratory muscles may not be adequately "primed" for the criterion performance task (Volianitis et al 1999). An inspiratory muscle warm-up (IMW) comprising inspiratory pressure-threshold loading increases inspiratory muscle strength and the maximum rate of inspiratory pressure development by 10% (Hawkes et al 2007;Lin et al 2007;Lomax et al 2011;Ross et al 2007;Tong and Fu. 2006;Volianitis et al 1999;Volianitis et al 2001).…”

Effect of Inspiratory Muscle Training on Weaning Success in Critically Ill Intubated Patients

“…www.intechopen.com Hawkes et al (2007) used electromyographic analysis to examine the effect of submaximal inspiratory overload on MIP and diaphragm and intercostal muscles. Results obtained 15 minutes after the test revealed an increase in MIP (p=0.032).…”